Abstract
The increasing demand for energy storage devices has propelled research for developing efficient super-capacitors (SC) with long cycle life and ultrahigh energy density. Carbon-based materials are commonly used as electrode materials for SC. Herein, we report a new approach to improve the SC performance utilizing a Porous Carbon/Cerium Oxide nanoparticle (PC-CON) hybrid as electrode material synthesized via a low temperature hydrothermal method. Through this approach, charges can be stored not only via electrochemical double layer capacitance (EDLC) from PC but also through pseudo-capacitive effect from CeO2 nanoparticles (NPs). The electrode-electrolyte interaction due to the electrochemical properties of the electrolyte provides an enhanced voltage window for the SC. Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS), and X-Ray Diffraction (XRD) measurements were used for the characterization of this PC/CeO2 hybrid material system. The testing results have shown that a maximum of 500% higher specific capacitance could be obtained using PC/CeO2 instead of using PC only.
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Kim, H., Shuvo, M.A.I., Karim, H. et al. Porous Carbon/CeO2 Nanoparticles Hybrid Material for High-Capacity Super-Capacitors. MRS Advances 2, 2471–2480 (2017). https://doi.org/10.1557/adv.2017.420
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DOI: https://doi.org/10.1557/adv.2017.420